CN106687249A - Method for cutting polarizing plate and polarizing plate cut using same - Google Patents
Method for cutting polarizing plate and polarizing plate cut using same Download PDFInfo
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- CN106687249A CN106687249A CN201580026862.4A CN201580026862A CN106687249A CN 106687249 A CN106687249 A CN 106687249A CN 201580026862 A CN201580026862 A CN 201580026862A CN 106687249 A CN106687249 A CN 106687249A
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- polarizer
- cutting
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- cut
- laser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0626—Energy control of the laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
- B23K26/0736—Shaping the laser spot into an oval shape, e.g. elliptic shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
- B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/30—Organic material
- B23K2103/42—Plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/54—Glass
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Polarising Elements (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a method for cutting a polarizing plate using a laser and a polarizing plate cut using the same, wherein the laser has an ellipsoidal beam shape and the major diameter of the oval shape is in parallel to a cut direction.
Description
Technical field
This application claims in the korean patent application 10-2014- in Korean Intellectual Property Office's submission on the 30th of September in 2014
The priority of No. 0130819 and rights and interests, the entire disclosure of which is incorporated herein by reference.
The present invention relates to a kind of method of use cut Polarizer.
Background technology
Due to LCD device compared with cathode ray displayss with low power consumption, small volume and light, therefore
It is easy to carry about with one, so liquid crystal display is quickly distributed as optical display element.In general, liquid crystal display (LCD)
Device is comprising liquid crystal layer and is layered in the two of the liquid crystal cells constituted by transparent glass substrate or based on the sheeting of plastics
Arrange based on Polarizer on individual surface.
Meanwhile, Polarizer generally comprise by be impregnated with dichroic dye or iodine and be stretched based on polyvinyl alcohol (
The polarization element that resin hereinafter referred to as " PVA ") is constituted, and with multiple structure, in the multiple structure, blooming leads to
Cross binding agent etc. to be layered on a surface of the polarization element or two surfaces, adhesion promoter (it is bonded to liquid crystal cells) with
And release film layer is laminated on a surface of the blooming, and protection film layer is stacked on another surface of the blooming.
In this case, as the blooming, with optics based on cellulose of the triacetyl cellulose (TAC) as representative
Film is generally used in correlation technique.However, having the disadvantage that this based on the blooming of cellulose as described above
Thin film does not have enough humidity resistances, and therefore if the polarization property and color of degree of polarization is in high temperature and in the environment of high humidity
Easily deterioration, and the interface between blooming and polaroid is easily peeled off.Further, since producing incline direction relative to incident illumination
On phase contrast, the viewing angle characteristic that there is a problem in that the LCD device for gradually increasing is affected, and because
This, recently energetically using the excellent blooming based on cycloolefins in terms of thermostability and optical clarity as optics
Film.
Meanwhile, need that Polarizer is cut to predetermine sizes so that Polarizer is applied to into LCD device.As
Cutting method, in the related, it has been suggested that following method：Cut Polarizer and improved by grinding technics using knife and cut
The quality on surface, thus also improves the quality of the Polarizer of final cutting.
However, with the trend of recent increase LCD device, for cutting into large-sized polarisation for obtaining
The cutting of plate increases with the demand of grinding technics, but the problems of be：Because there is big chi by using knife cutting
The technology of very little Polarizer develops still not enough and needs additional technique facility so production cost is improved.In addition, being cut using knife
In the case of cutting, in order to still ensure the excellent product of cutting surfaces when there is slight crack or abrasion and scuffing on the cutting blade of knife
Matter, needs to regularly replace the cutting blade of knife, therefore causes the problem of production cost increase.
Accordingly, as its replacement scheme, recently, the cutting of Polarizer is energetically carried out by using laser.Typically
For, in the case of using cut Polarizer, when the absorbing wavelength according to the laser of thin film selects laser, formed
Excellent cutting surfaces, and then need to cut Polarizer.However, the laser of the Polarizer comprising the blooming based on cycloolefins
Absorbing wavelength it is different from the absorbing wavelength of the laser of the blooming based on cellulose being generally used in correlation technique, and therefore
The problem of generation is to apply excessive heat to Polarizer to cut Polarizer, the cutting surfaces of Polarizer thus deformation.
If cutting surfaces deformation as described above, the cohesive deterioration when cutting surfaces are laminated with liquid crystal cells, and due to mistake
Calorimetric and cause to make producing the foreign substance such as dust of a large amount of bubbles and generation on the laminating surface of cutting surfaces
Into the open defect of LCD device, therefore cause to produce loss and make productivity ratio significantly reduced during production technology
Problem.
The content of the invention
Technical problem
The present invention will solve foregoing problems, and it is logical to be intended to the method and one kind of a kind of use cut Polarizer of offer
Cross the Polarizer for using the method cutting.
Technical scheme
On the one hand, the present invention provides a kind of method of use cut Polarizer, and wherein laser beam is shaped as ellipse
The major axis of shape and the elliptical shape is parallel with cut direction.
On the other hand, the present invention provides a kind of Polarizer cut by preceding method.
Beneficial effect
According to the cross section good quality of the Polarizer of present invention cutting, this is because not deformed on cutting surfaces
And can minimally generation smog.In addition, when by liquid crystal cells are applied to according to the Polarizer of present invention cutting, it is possible to
Excellent LCD device in terms of presentation quality and optical characteristics is obtained by significantly decreasing bubble generation rate.
Meanwhile, the method for cutting Polarizer of the invention is readily applied to the cutting of big Polarizer and can simplify
The technique of cutting Polarizer, and therefore with large-duty advantage can be put forward.
Description of the drawings
Fig. 1 (a) to Fig. 1 (c) is used to explain taper forming region (taper formation region).
Fig. 2 is exemplarily illustrated for the laser beam shape for cutting the method for Polarizer of the invention.
Fig. 3 illustrates the vertical cross-section of the Polarizer according to the cutting of embodiment 1.
Fig. 4 illustrates the vertical cross-section of the Polarizer according to the cutting of embodiment 2.
Fig. 5 illustrates the vertical cross-section of the Polarizer according to the cutting of embodiment 3.
Fig. 6 illustrates the vertical cross-section of the Polarizer according to the cutting of comparing embodiment 1.
Whether Fig. 7 explanations produce bubble and generation when the Polarizer cut according to embodiment 1 is attached to glass substrate
Smog.
Whether Fig. 8 explanations produce bubble and generation when the Polarizer cut according to embodiment 2 is attached to glass substrate
Smog.
Whether Fig. 9 explanations produce bubble when the Polarizer cut according to comparing embodiment 1 is attached to glass substrate.
Whether Figure 10 explanations produce bubble when the Polarizer cut according to comparing embodiment 2 is attached to glass substrate.
Whether Figure 11 explanations produce smog on the Polarizer cut according to comparing embodiment 1.
Specific embodiment
Hereinafter, by the preferred illustrative embodiment of the description present invention.However, the illustrative embodiments of the present invention
Can be modified to various other forms, and the scope of the present invention is not limited to the illustrative embodiments that are described below.In addition, carrying
For the present invention illustrative embodiments more fully explaining the present invention to those of ordinary skill in the art.
It is widely studied due to carrying out to solve foregoing problems, present inventor have found that, even if making laser
The shape of beam remains elliptical shape and makes the major axis of the elliptical shape perform cutting technique while parallel with cut direction,
To cut during the Polarizer comprising two or more different thin film of laser absorption wavelength, it is also possible to obtain cutting surfaces quality
Excellent Polarizer, thus completes the present invention.
More specifically, it is a feature of the present invention that a kind of method of use cut Polarizer, wherein laser beam
The major axis for being shaped as elliptical shape and the elliptical shape is parallel with cut direction.In order to more fully understand, Fig. 2 is exemplarily illustrated
The shape of the laser beam used for the method for cutting Polarizer of the invention.
In this case, the elliptical shape can have 1:0.8 to 1:0.2、1:0.6 to 1:0.2 or 1:0.6 to 1:
0.4 major axis (t1) to short axle (t2) ratio.As the major axis (t of laser beam shape1) to short axle (t2) ratio meet the numerical value
During scope, the cutting surfaces of Polarizer can be prevented thermally damaged, this is because being possible to reduce application when Polarizer is cut
Laser average output, and therefore, the ratio is highly beneficial.In addition, when Polarizer is cut with circular laser beam, in cutting
Excessive smoke is produced around surface, thereby increases and it is possible to produce uncut part, and therefore the problem that occurs is that cut quality is fast
Deteriorate fastly, but as described above, the major axis (t for suitably adjusting laser beam shape can be passed through1) and short axle (t2) between ratio
Rate difference and prevent the problem.
In addition, in order to ellipse by using having as above in the method for cutting Polarizer of the invention
The laser beam of toroidal using compound lens, and uses single lens cutting Polarizer unlike in correlation technique.At this
In the case of kind, compound lens can be produced to change according to use condition diversing lens are incident to by lens design system
Beam diameter.In this case, the good quality of light beam can be made by arranging big and parallel lasing beam diameter as far as possible.
The final lens for producing can be arranged by following system：This system by combine refractive index and thickness so that lens have it is appropriate
Major axis and short axle and produce ellipse.For each lens in the compound lens, when necessary, can free adjustment position
To the direction of the launch of light beam, and it is therefore possible to adjust ratio of the major axis in above-mentioned elliptical shape to short axle.
In this case, the cutting speed of the laser beam in the technique of the cutting Polarizer can be 100 mm/seconds
To 1,000 mm/second, such as 100 mm/seconds to 600 mm/seconds, 300 mm/seconds to 600 mm/seconds, or 600 mm/seconds
To 1,000 mm/seconds.Suitably speed Polarizer can be cut according to the process conditions of cutting Polarizer, but ought at full speed be cut
Polarizer is cut can generally to obtain more favourable result during the quality for further improving cutting surfaces.However, it is contemplated that inclined
The fair average output of the laser required for the hot transfer efficiency produced during the cut of tabula rasa and cutting, works as laser
When the cutting speed of beam meets the numerical range, gas can be made when the Polarizer for undergoing cutting technique is attached to into liquid crystal panel
The generation of bubble and the generation of smog are minimized.The smog is the by-product produced when Polarizer is cut, and is referred to
The foreign substance of issuable such as thin dirt in technique using cut Polarizer.Figure 10 explanations are according to comparing enforcement
The situation of the smog is produced on the Polarizer of the cutting of example 1, and can be confirmed, around the taper (taper) formed during cutting
Form thin dirt.
Next, the output of the laser beam may depend on following factor and change：The thickness of Polarizer to be cut；Constitute
The type of the blooming, mould release membrance and protecting film of Polarizer；The thickness of polaroid；Perform method of cutting technique etc..So
And, when using method for cutting Polarizer of the invention, when using the blooming situation based on cellulose, making
With the blooming based on cycloolefins as blooming in the case of (it is assumed that the thickness of Polarizer is mutually the same) cutting Polarizer institute
The output of the laser beam of needs can be 100% to 130% or 110% to 120%.This is because being possible to the Polarizer in cutting
The generation that bubble is made when being attached to liquid crystal panel is minimized.
In this case, the pulse energy of the laser beam can be in the range of 1mJ to 10mJ, and more preferably 5mJ is extremely
7mJ.In addition, can be performed by single diced system or multiple diced system using cut Polarizer, but not limited to this.Especially
Preferably, the cutting in the present invention is performed by single diced system.The single diced system refers to that cutting technique is logical
Cross and perform the method for cutting when laser beam moves one time performing, and laser beam movement several times when perform cutting technique
In the case of multiple diced system, if laser beam movement can represent different cutting characteristics, but when cutting is cut by single
When cutting system and performing, the cutting is performed by disposable technique, and therefore can further improve the quality of cutting surfaces.
Meanwhile, it is of the invention for cutting the method for Polarizer in laser can be CO2Laser or UV laser.It is preferred that
Be, it is contemplated that the cutting technique condition of Polarizer and productivity ratio and properly select the species of laser.In this case,
When by using CO2When laser performs the technique of cutting Polarizer, oscillation wavelength can be 9.0 microns to 10.9 microns, more specifically
For, 9.0 microns to 9.6 microns, 10.1 microns to 10.9 microns, or 9.5 microns to 10.5 microns.However, it is contemplated that cutting
Polarizer cross section quality, it is further preferred that using UV laser, and in this case, the ripple of the UV laser for being used
Length can be in the range of 300 nanometers to 400 nanometers, more preferably 330 nanometers to 370 nanometers, and most preferably 350 nanometers extremely
360 nanometers.
Next, the taper formed on the cutting surfaces of the Polarizer of the cutting method cutting by using the present invention
Size can be 50 microns to 150 microns, more preferably 80 microns to 120 microns, and most preferably 90 microns to 100 microns.More
Specifically, when the draw direction of Polarizer is identical with its cut direction, the size of the taper can be micro- for 70 microns to 140
Rice or 90 microns to 110 microns, and when on the direction of the draw direction of Polarizer cut Polarizer when, the taper
Size can be 70 microns to 140 microns or 90 microns to 110 microns.The size of the taper in this specification is by measuring such as
The Breadth Maximum of lower described part and the value that obtains：At the part, cutting when by using laser to cut Polarizer
Cut and exist in the vertical cross-section of part deformation, such as Fig. 1 (a) to Fig. 1 (c) is illustrated.
Meanwhile, the Polarizer that description can be cut by using cutting method of the invention.
In the present invention, Polarizer can have, for example, protection film/optical film/polaroid/blooming/adhesive phase/from
The structure that type film is laminated with this order, but the structure not limited to this.
In this case, the polaroid is not particularly restricted, and can use polaroid well known in the art, example
Such as, the thin film being made up of the polyvinyl alcohol (PVA) comprising iodine or dichroic dye.In this manual, the polaroid is
Refer to the state not comprising protecting film (hyaline membrane), and Polarizer refers to the state comprising protecting film (hyaline membrane).
Meanwhile, Polarizer of the invention can further include on a surface or two surfaces of the polaroid
Adhesive phase.In this case, the binding agent that can be used when described adhesive layer is formed can be for generally in the art
The aqueouss for using or nonaqueous pressure-sensitive adhesive.
In this case, as the aqueous binder, (such as) can without limitation be used based on poly- second
The binding agent of enol, acrylic adhesive, based on the binding agent of epoxy resin, the binding agent based on carbamate
(urethane-based adhesive) etc..In view of with the bonding strength of the polaroid etc., the base in the middle of these binding agents
In the binding agent of polyvinyl alcohol be preferred, and when use in the middle of these binding agents comprising acetoacetyl etc. based on modified
Polyvinyl alcohol binding agent when, can further improve cohesive.As the concrete reality of the binding agent based on polyvinyl alcohol
Example, it is possible to use by Japanese synthetic chemical industry company limited (Nippon Synthetic Chemical Industry Co.,
Ltd.) Gohsefimer (trade (brand) name) Z-100, Z-200, Z-200H, Z-210, Z-220, Z-320 of manufacture etc., but the base
In the binding agent not limited to this of polyvinyl alcohol.
Here, polaroid is bonded using the aqueous binder can perform by the following method with blooming：First
By using roll-coater (roll coater), gravure coater (gravure coater), rod coater, knife type coater
Or capillary coater (capillary coater) etc. by adhesive coated, in PVA film, (it is the protecting film for polaroid
Or polaroid) surface on, and before described adhesive is completely dried by using laminating roll (laminating roll) come
Hot pressing or room temperature voltage protection film and polarizing coating are being laminated the protecting film with the polarizing coating.When using heat-fusible adhesive
When, need to use hot-pressing roller.
Meanwhile, the nonaqueous pressure-sensitive adhesive can be the binding agent of UV-curable and not be particularly restricted, but described non-aqueous
The example of property binding agent includes：Using the binding agent of optical free radical polyreaction, such as bonding based on (methyl) acrylate
Agent, the binding agent based on alkene/mercaptan and the binding agent based on unsaturated polyester (UP)；Using the bonding of light cationic polymerization
Agent, such as based on the binding agent of epoxy resin, based on the binding agent of oxetanes, based on epoxy resin/oxetanes
Binding agent and the binding agent based on vinyl Ether etc..
In this case, bonding the polaroid using the nonaqueous pressure-sensitive adhesive can pass through as follows with the blooming
Method is performed：Apply adhesive composition to form adhesive phase, be laminated the polaroid and the blooming, and then pass through
Light irradiation is solidifying described adhesive compositionss.
In the present invention, the blooming typically refers to perform the film of optical function, and not only has comprising sense stricto
The hyaline membrane of 80% or more light transmittance, and comprising the blooming with 50% or lower light transmittance, as long as the light
It is the thin film (such as Polarizer) for performing particular optical function to learn film.
In this case, the blooming can be one or more (for example) in the following：Polyolefin is thin
Film (polyolefin film), polypropylene film (polypropylene film), polyurethane film (polyurethane
Film thin film (ester-based film)), based on ester, polyethylene film (polyethylene film), based on cycloolefins
Thin film (cyclo olefin-based film), acrylic films (acrylic film), the thin film based on polyvinyl alcohol
(polyvinyl alcohol-based film) and the thin film (cellulose-based film) based on cellulose, but not
It is limited to this.
More specifically, the Polarizer can be comprising based on polyolefinic thin film.Swashing in by using correlation technique
When light cutting is comprising Polarizer based on polyolefinic thin film, the quality deterioration of cutting surfaces, and when Polarizer is applied to into liquid
During brilliant unit, there are producing a large amount of bubbles, and therefore LCD device presentation quality deterioration.However, such as existing
In the present invention, overlap with cut direction and polarisation is cut by using the laser beam with elliptical shape when the major axis of ellipse is made
During plate, advantage is that productivity ratio is excellent, as it is possible that obtaining the Polarizer of the cutting surfaces with excellent quality, Er Qiefei
Often it is easy to for the laser beam to be applied to the technique of cutting big Polarizer.
Next, the thickness of the blooming can be (for example) 10 microns to 80 microns or 10 microns to 40 microns, but not
It is limited to this.This is because when the thickness of the blooming meets the numerical range, LCD device can be being met
The Polarizer with excellent optical property is obtained while slim trend.In addition, the research carried out according to the present inventor, optics
The thickness of film is thinner and cuts the energy of laser needed for the technique of Polarizer and (that is, cuts the minimum pulse energy required for polarizing coating
Amount) it is less, then energy efficiency and cut quality it is more favourable (see below will description embodiment 1 and embodiment 3).
When necessary, in the blooming, can be to the blooming or a surface of the thin film based on polyvinyl alcohol
Or two surfaces perform surface treatment, further to improve bonding strength.In this case, can pass through well known in the art
Various surface treatments (for example, sided corona treatment, plasma treatment, using as NaOH or KOH strong alkali aqueous solution surface be modified
Process, or prime treatment etc.) performing the surface treatment.
Meanwhile, used as the blooming, the blooming being constructed from the same material can be used on two surfaces of polaroid, and
The blooming being made up of different materials can also be used on two surfaces of polaroid.For example, as the blooming, can be
Acrylic films are used on one surface of polaroid and can be used based on the thin of cycloolefins on another surface of polaroid
Film, or using TAC film and can use based on cycloolefins on another surface of polaroid on polaroid surface
Thin film, and the blooming is not particularly limited.
Meanwhile, the species of protecting film and mould release membrance is not particularly restricted, as long as these thin film are that typically in this area
Used in.The example includes：Based on polyolefinic thin film, such as polyethylene, polypropylene, poly-1-butylene, poly- 4- first
Base -1- amylenes, ethylene-propylene copolymer, ethylene-butene-1 copolymer, vinyl-vinyl acetate copolymer, ethylene-acrylic acid
Methacrylate copolymers and ethylene-vinyl alcohol copolymer；Based on the thin film of polyester, such as polyethylene terephthalate, poly- naphthalene two
Formic acid second diester and polybutylene terephthalate；Based on the thin film of polyamide, such as polyacrylate, polystyrene, Buddhist nun
Dragon 6 and partially aromatic polyamide；Polyvinyl chloride film；Polyvinylidene chloride film；Or polycarbonate film etc..Particularly,
In the case of mould release membrance, can be by being appropriately performed stripping based on the powder of silicone, based on the powder of fluorine, silica powder etc.
Process (release treatment).
In addition, the mould release membrance is attached to a surface of blooming by viscosifier.In this case, viscosifier
Material is not particularly restricted, and can without limitation use various viscosifier known in the art.For example,
The viscosifier can be formed by using the typical polymers of such as the following：Acrylic acid series copolymer, natural rubber, benzene second
Alkene-isoprene styrene (SIS) block copolymer, s-B-S (SBS) block copolymer, styrene-
Ethylene butylene-styrene (styrene-ethylene butylene-styrene；SEBS) block copolymer, styrene-fourth two
Alkene rubber, polybutadiene, polyisoprene, polyisobutylene, butyl rubber, chloroprene rubber and silicone rubber.
There can be 50 microns to 250 microns of thickness with the Polarizer of the invention for arranging as described above.When logical
It is excellent in terms of the quality of cutting surfaces to cut the Polarizer for during Polarizer, being cut to cross cutting method of the invention,
And the taper forming region is significantly reduced in size, and thus can remove the mould release membrance that is arranged in most external office with
And ensure excellent cohesive when after protecting film Polarizer being applied to into liquid crystal cells.Due to excellent cohesive significantly
Reduce bubble to produce, therefore the LCD device with excellent appearance characteristics can be obtained.
Embodiment 1
By using with major axis to short axle ratio be 1:0.5 oval-shaped laser beam is in the draw direction phase with Polarizer
Polarizer is cut on same direction, in the Polarizer, PET film/TAC film/PVA polarization elements/COP thin film/viscosifier
Layer/PET film is stacked gradually.In this case, the COP thin film for being used has 60 microns of thickness, and Polarizer has
250 microns of thickness.Additionally, the laser required for cutting Polarizer has a minimum pulse energy of 5.4mJ, and 333 millimeters/
The cutting speed of second.
Embodiment 2
Except in addition to Polarizer is cut on the direction of the draw direction of Polarizer, with the same manner as in Example 1
Mode cut Polarizer.In this case, the minimum pulse energy that the laser required for Polarizer has 6.4mJ is cut,
And 700 mm/second cutting speed.
Embodiment 3
In addition to there is 230 microns of thickness using the COP thin film and Polarizer of the thickness with 40 microns, with reality
Apply identical mode in example 1 and cut Polarizer.In this case, the minimum that the laser required for Polarizer has 5mJ is cut
Pulse energy, and the cutting speed of 333 mm/seconds.
Comparing embodiment 1
Polarizer, in the Polarizer, PET film/TAC film/PVA polarisations are cut by using with circular laser beam
Element/COP thin film/adhesion promoter/PET film is stacked gradually.In this case, minimum pulse energy is 6.2mJ, and is cut
Speed is 333 mm/seconds.
The cross section of Polarizer after laser cutting is illustrated in Fig. 6.Cutting surfaces are arranged in into left side, and ought be passed through
When the Polarizer comprising COP thin film is cut using the laser lamp in correlation technique, there is part COP thin film melts and flowing
Phenomenon, it is illustrated in the region being such as illustrated by the broken lines.Therefore, it is deformed in cut end.
Comparing embodiment 2
Polarizer is being cut on the direction of the draw direction of Polarizer by using with circular laser beam, at this
In Polarizer, PET film/TAC film/PVA polarization elements/COP thin film/adhesion promoter/PET film is stacked gradually.This
In the case of, minimum pulse energy is 6.7mJ, and cutting speed is 700 mm/seconds.
The taper dimensional measurement of EXPERIMENTAL EXAMPLE 1-
If the size of measurement stem portion, in these sections, according to embodiment 1 to embodiment 3 and comparing embodiment 1 with
And form taper in the vertical cross-section of the Polarizer of the cutting of comparing embodiment 2.By using microscope (OLYMOUS STM6)
To measure, and result is shown in the following table 1.
[table 1]
| Classification | The size of taper |
| Embodiment 1 | 93 microns |
| Embodiment 2 | 101 microns |
| Embodiment 3 | 87 microns |
| Comparing embodiment 1 | 125 microns |
| Comparing embodiment 2 | 132 microns |
EXPERIMENTAL EXAMPLE 2- cutting surfaces exist and there is no deformation
It is amplified according to embodiment 1 to embodiment 3 and comparing embodiment 1 by using microscope (OLYMOUS STM6)
The cross section of the Polarizer after cut, and then cutting surfaces are arranged in into left side and in Fig. 3 to Fig. 6 illustrate that this is cut
Cut surface.
According to Fig. 3 to Fig. 5, can be observed in the situation of embodiment 1 to embodiment 3, except being arranged in Polarizer most
Cut with a snap the cross section of other layers beyond the protecting film and mould release membrance of outer portion.
However, as depicted in fig.6, in the comparison reality by using circular laser beam Polarizer of the cutting comprising COP thin film
In applying the situation of example 1, there is the partial melting of COP thin film and the phenomenon of flowing, such as institute in the region that represented by red dotted line
Explanation.It is therefore seen that, it is deformed in cut end.
There is with the generation that there is no bubble and exist and do not exist the generation of smog in EXPERIMENTAL EXAMPLE 3-
Using the Polarizer cut with comparing embodiment 1 and comparing embodiment 2 according to embodiment 1 and embodiment 2
Formation have adhesion promoter side peel off PET film (mould release membrance), be attached to glass substrate, then pass through and use microscope
(OLYMOUS STM6) amplifies 12.5 times, and then, whether perusal produces bubble.In addition, according to embodiment 1 and in fact
In applying the Polarizer of example 2 and comparing embodiment 1, the region that can produce smog is represented by red dotted line.
As illustrated by Fig. 7 and Fig. 8, it can be seen that be attached with the Polarizer according to embodiment 1 and the cutting of embodiment 2
Glass substrate on seldom produce bubble, and smog is also seldom produced when the red dashed region is checked.
By contrast, as illustrated by Fig. 9 and Figure 10, it can be seen that be attached with according to comparing embodiment 1 and compare enforcement
When the glass substrate of the Polarizer of the cutting of example 2 is laminated, while thick-layer is formed bubble is generated.In addition, referring to Figure 11, can be true
Recognize, cambial around taper while form thin dirt in the Polarizer cut according to comparing embodiment 1, such as red dotted line
It is indicated in region.I.e., it can be seen that in the Polarizer cut according to comparing embodiment 1, because foreign substance (smog) decile
Dissipate and be attached to around the cutting surfaces of Polarizer, so cross section quality is significantly deteriorated.
Even if having described the illustrative embodiments of the present invention in detail, the true scope of the present invention is not limited to this, and
It is evident that without departing from described in detail in the claims for this area has one of ordinary skill
In the case of the technical spirit of the present invention, various modifications and change are even more possible.
<Reference and symbol description>
10：Polaroid
15：Adhesion promoter
16：Adhesive phase
20：COP thin film
30：TAC film
40：Mould release membrance
50：Protecting film
t1：The major axis of beam shape
t2：The short axle of beam shape
Claims (15)
1. a kind of for using the method for cut Polarizer, wherein laser beam is shaped as elliptical shape and the ellipse
The major axis of shape is parallel with cut direction.
2. the method for claim 1, wherein the elliptical shape has 1:0.8 to 1:Ratio of 0.2 major axis to short axle
Rate.
3. the method for claim 1, wherein the laser beam has the cutting of 100 mm/seconds to 1,000 mm/second
Speed.
4. the method for claim 1, wherein the laser beam has the pulse energy in the range of 1mJ to 10mJ.
5. the method for claim 1, wherein the laser is CO2Laser or UV laser.
6. method as claimed in claim 5, wherein, the UV laser has 300 nanometers to 400 nanometers of wavelength.
7. method as claimed in claim 5, wherein, the CO2Laser has 9.0 microns to 10.9 microns of oscillation wavelength.
8. the method for claim 1, wherein using cut Polarizer by single diced system or multiple cutting
System is performed.
9. the taper for the method for claim 1, wherein being formed on the cutting surfaces of the Polarizer has 50 microns
To 150 microns of size.
10. the method for claim 1, wherein the cut direction is identical with the draw direction of Polarizer, and in institute
State the size that the taper formed on the cutting surfaces of Polarizer has 70 microns to 140 microns.
11. the method for claim 1, wherein the cut direction be the direction vertical with the draw direction of Polarizer,
And the taper formed on the cutting surfaces of the Polarizer has 70 microns to 140 microns of size.
12. the method for claim 1, wherein the Polarizer comprising selected from polyolefin film, polypropylene film, poly-
Urethane thin film, based on the thin film of ester, polyethylene film, based on the thin film of cycloolefins, acrylic films, based on polyvinyl alcohol
Thin film and based on one or more thin film in the thin film of cellulose as blooming.
13. methods as claimed in claim 12, wherein, the thin film based on cycloolefins has 10 microns to 80 microns of thickness
Degree.
14. the method for claim 1, wherein the Polarizer there is 50 microns to 250 microns of thickness.
A kind of 15. Polarizers of the method cutting by as any one of claim 1 to 14.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140130819A KR101817388B1 (en) | 2014-09-30 | 2014-09-30 | Cutting method for the polarizing plate, polarizing plate cut usuing the same |
| KR10-2014-0130819 | 2014-09-30 | ||
| PCT/KR2015/009964 WO2016052902A1 (en) | 2014-09-30 | 2015-09-22 | Method for cutting polarizing plate and polarizing plate cut using same |
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| CN106687249A true CN106687249A (en) | 2017-05-17 |
| CN106687249B CN106687249B (en) | 2020-02-28 |
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| CN201580026862.4A Active CN106687249B (en) | 2014-09-30 | 2015-09-22 | Method for cutting polarizing plate and polarizing plate cut using the same |
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| Country | Link |
|---|---|
| US (1) | US10821553B2 (en) |
| EP (1) | EP3202527B1 (en) |
| JP (1) | JP2017531813A (en) |
| KR (1) | KR101817388B1 (en) |
| CN (1) | CN106687249B (en) |
| TW (1) | TWI560016B (en) |
| WO (1) | WO2016052902A1 (en) |
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| JP7316297B2 (en) * | 2018-11-02 | 2023-07-27 | 日東電工株式会社 | LASER CUTTING METHOD FOR POLARIZING OPTICAL FUNCTION FILM LAMINATED BODY |
| JP6792660B2 (en) * | 2019-03-04 | 2020-11-25 | 住友化学株式会社 | Optical laminate and its manufacturing method |
| JP2021098206A (en) * | 2019-12-20 | 2021-07-01 | 日本ゼオン株式会社 | Method for manufacturing transmission type optical element |
| CN115280200A (en) * | 2020-03-16 | 2022-11-01 | 住友化学株式会社 | Laminated sheet and method for producing same |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160038272A (en) | 2016-04-07 |
| US20170120389A1 (en) | 2017-05-04 |
| KR101817388B1 (en) | 2018-01-10 |
| CN106687249B (en) | 2020-02-28 |
| EP3202527A1 (en) | 2017-08-09 |
| EP3202527B1 (en) | 2021-12-22 |
| EP3202527A4 (en) | 2018-07-11 |
| WO2016052902A1 (en) | 2016-04-07 |
| TWI560016B (en) | 2016-12-01 |
| TW201622865A (en) | 2016-07-01 |
| US10821553B2 (en) | 2020-11-03 |
| JP2017531813A (en) | 2017-10-26 |
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